Problems implementing R in Knime

[millainthesky]

Hi everyone,
I have a problem with the implementation of R in Knime. I downloaded the version 3.6.1 of R and I did all the procedures for implementing the software in Knime, but every time I use the R nodes in Knime they give me this two errors:
-ERROR R Source (Table) 3:300 Execute failed: R evaluation failed.: “knime.out[1:150,5]” (outside the node)
-ERROR: Could not execute internal command.ERROR: R evaluation failed.: "sapply(ls(),function(a)class(get(a,envir=globalenv()))[1])"ERROR: R evaluation failed.: "sapply(ls(),function(a)class(get(a,envir=globalenv()))[1])"ERROR: eval failed (inside the node).

Could you help me?
Thank you,
Camilla

[Aswin]

Dear Camilla

Not sure if this helps, but I remember getting similar errors when I was trying to use an account-specific installation of R instead of the systemwide R on my Linux system. I could not figure out how to fix the problem, so I went back to the system R, and then it worked again. So, if you are working under Windows, installing R as admin may perhaps solve the problem

Or you could wait for advice from more knowledgeable people…

Good luck
Aswin

[mlauber71]

You could read this entry and see if it can help you with KNIME and R:

Install R alongside KNIME on Windows and MacOS

Over the last months I have collected a few entries about the installation of R alongside KNIME that contain some maybe useful hints how to overcome certain obstacles while installing them. I want to bring them together here. (If you are looking for a basic guide about how to install R in the first place you might look here or here). A few maybe unnecessary remarks upfront. Yes it takes some effort to get KNIME and R up and running but in the end you will be rewarded with the whole world of pos…

how to import tables from .docx documents via R snippet

Not exactly sure what you mean by installed by both R and RStudio. Typically you should only have one R installation with one library. You could try and check your version’s library with this comand: .libPaths() The error messages hint that you do not have the relevant package docxtractr installed. And you will have to install RServe in the latest version. One thing I had success wit recently is described here: After you have done that you could tell RStudio to find the Rtools necessary to…

Or maybe you could provide us with more information about your environment. You might use this workflow to get insights:

check version of R packages in KNIME – mlauber71

[millainthesky]

Thank for your answer!
I solved the problem thanks to your help! I was missing some packages to install and now I managed to connect R a Knime.
Camilla